Auto Answering machine / Support all android versions

If the user does’t accept the call for a specific time then the app should automatically receive the call it should play a default voice ask the other party to speak after the beep . wt ever voice comes after the beep should be recorded for the default time then disconnect(default voice, recording everything should be internal nothing on loud speaker ) . The voice should be saved in the local phone which can be accessible later on . there should be a notification on the bar